How do you remove 10 ppm of iron from well water at pH 6?
| Treatmentgreensand or catalytic media oxidises the iron, then traps the particles | oxidising iron filter |
|---|---|
| Typical installed cost | $1,200–2,500 |
| Iron form at this pHclear at the tap, stains within minutes | ferrous (dissolved) |
| IronEPA secondary standard is 0.3 ppm | 10ppm |
| EPA threshold | 0.3ppm |
| Load added to a softenerabout 4 gpg of hardness capacity per 1 ppm of iron | 40gpg equivalent |
Notes
- pH decides the method, and almost nobody measures it. Below pH 7 iron is dissolved — the water looks clear at the tap and stains minutes later. At pH 6 it is still dissolved, which is what makes a softener an option at low concentrations. This single number is why advice online contradicts itself: everyone is right for their own pH.
- At 10 ppm a softener alone will not cope, whatever the pH. It needs a filter that oxidises the iron and then catches it, ahead of any softener.
- Treat iron before the softener, never after. Whatever the method, iron removal goes first in the line. A softener downstream of clean water lasts; a softener taking raw iron is a filter that was not designed to be one.
- Get a real lab test, not a strip. You need iron, pH, manganese, hardness and — if there is a smell — hydrogen sulphide. Manganese behaves like iron but stains black instead of orange, and it needs a higher pH to oxidise. A test strip gives you one of those five numbers, badly.
- Iron bacteria are a different problem with the same symptom. If there is orange slime in the toilet cistern rather than a stain, no filter will fix it — that needs shock chlorination of the well itself first.
10 ppm of iron at pH 6
The iron here is ferrous (dissolved), and the method that works is oxidising iron filter.
pH decides the method, and almost nobody measures it
Everyone tests iron. Very few test pH — and pH is what chooses the equipment.
| pH | Iron form | What it looks like |
|---|---|---|
| below 7 | ferrous, dissolved | clear at the tap, stains minutes later |
| 7 and above | ferric, oxidised | cloudy the moment it leaves the tap |
A softener can hold dissolved iron. It cannot hold particles — those foul the resin bed instead of binding to it.
This is why advice online contradicts itself. Everyone is right for their own pH.
Iron eats softener capacity
Every 1 ppm of iron costs roughly 4 gpg of hardness capacity. At 10 ppm that is about 40 gpg added to whatever the water test said.
Sizing a softener on hardness alone is why a correctly chosen unit still delivers stained water by day five.
Treat iron before the softener, never after
Whatever the method, iron removal goes first in the line.
A softener downstream of clean water lasts. A softener taking raw iron is a filter that was never designed to be one.
Get a lab test, not a strip
You need iron, pH, manganese, hardness, and — if there is a smell — hydrogen sulphide.
Manganese behaves like iron but stains black instead of orange, and it needs a higher pH to oxidise. A test strip gives you one of those five numbers, badly.
Orange slime is a different problem
If the toilet cistern has slime rather than a stain, that is iron bacteria. No filter fixes it — the well itself needs shock chlorination first.
Nearby sizes
- How do you remove 7 ppm of iron from well water at pH 6?
- How do you remove 15 ppm of iron from well water at pH 6?
- How do you remove 5 ppm of iron from well water at pH 6?
- How do you remove 20 ppm of iron from well water at pH 6?
- How do you remove 10 ppm of iron from well water at pH 6.5?
- How do you remove 10 ppm of iron from well water at pH 6.8?
Read more
- Orange Slime in the Toilet Tank Is Not Iron — It Is Iron BacteriaA filter removes iron. Nothing filters out a colony that is living in the well casing, and that distinction decides whether the money you spend does anything.
- Water Softener Installation Cost by State — 48,000 Grain, All 51Only 35% of this job is labour, so the state spread is just 26%. A quote at double the figure below is not explained by local wages.
- Water Still Hard After Installing a Softener — Seven CausesTest the outlet before blaming the unit. Half of these faults are a setting, and one of them is that the softener was never plumbed into the line it was meant to soften.
- Well Pump Short Cycling — It Is Almost Always the TankMotors are killed by starting, not by running. A short-cycling pump can burn out in months, and the cause is usually a tank that costs a fraction of the pump.